Makita DTD152Z Instruction Manual

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9 ENGLISHProper fastening torque for high tensile bolt0 1 2 3M12M10160(1632)140(1428)120(1224)100(1020)80(816)60(612)40(408)20(204)M8M12M10M8N•m(kgf•cm)211. Fastening time (second) 2. Fastening torqueHold the tool firmly and place the point of the driver bitin the screw head. Apply forward pressure to the tool tothe extent that the bit will not slip off the screw and turnthe tool on to start operation.NOTICE: If you use a spare battery to continuethe operation, rest the tool at least 15 min.NOTE: Use the proper bit for the head of the screw/bolt that you wish to use.NOTE: When fastening M8 or smaller screw, carefullyadjust pressure on the switch trigger so that the screwis not damaged.NOTE: Hold the tool pointed straight at the screw.NOTE: If the impact force is too strong or you tightenthe screw for a time longer than shown in the figures,the screw or the point of the driver bit may be over-stressed, stripped, damaged, etc. Before starting yourjob, always perform a test operation to determine theproper fastening time for your screw.The fastening torque is affected by a wide variety offactors including the following. After fastening, alwayscheck the torque with a torque wrench.1. When the battery cartridge is discharged almostcompletely, voltage will drop and the fasteningtorque will be reduced.2. Driver bit or socket bitFailure to use the correct size driver bit or socketbit will cause a reduction in the fastening torque.3. Bolt• Even though the torque coefficient and theclass of bolt are the same, the proper fasten-ing torque will differ according to the diame-ter of bolt.• Even though the diameters of bolts are thesame, the proper fastening torque will differaccording to the torque coefficient, the classof bolt and the bolt length.4. The manner of holding the tool or the materialof driving position to be fastened will affect thetorque.5. Operating the tool at low speed will cause a reduc-tion in the fastening torque.MAINTENANCECAUTION: Always be sure that the tool isswitched off and the battery cartridge is removedbefore attempting to perform inspection ormaintenance.NOTICE: Never use gasoline, benzine, thinner,alcohol or the like. Discoloration, deformation orcracks may result.Replacing carbon brushes► Fig.12: 1. Limit markCheck the carbon brushes regularly.Replace them when they wear down to the limit mark.Keep the carbon brushes clean and free to slip in theholders. All carbon brushes should be replaced at thesame time. Use only identical carbon brushes.1. Use a screwdriver to remove two screws thenremove the rear cover.► Fig.13: 1. Rear cover 2. Screw2. Raise the arm part of the spring and then placeit in the recessed part of the housing with a slotted bitscrewdriver of slender shaft or the like.► Fig.14: 1. Recessed part 2. Spring 3. Arm3. Use pliers to remove the carbon brush caps ofthe carbon brushes. Take out the worn carbon brushes,insert the new ones and replace the carbon brush capsin reverse.► Fig.15: 1. Carbon brush cap4. Make sure to place the lead wire in opposite sideof the arm.► Fig.16: 1. Lead wire 2. Carbon brush cap5. Make sure that the carbon brush caps have fit intothe holes in brush holders securely.► Fig.17: 1. Hole 2. Carbon brush cap6. Reinstall the rear cover and tighten two screwssecurely.7. Insert the battery cartridge into the tool and breakin brushes by running tool with no load for about 1minute.8. Check the tool while running and electric brakeoperation when releasing the switch trigger. If electricbrake is not working well, ask Makita Authorized orFactory Service Centers for repair.To maintain product SAFETY and RELIABILITY,repairs, any other maintenance or adjustment shouldbe performed by Makita Authorized or Factory ServiceCenters, always using Makita replacement parts.

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